Adding attachment for type-writers.



H. H. BURTON. ADDING ATTACHMENT FOR TYPE WRITERS. APPLIOATION FILED JULY 23,1908.

921,358. Patented May 11, 1909.

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Patented May 11, 1909.

@ E EEEBE I I l l I I I I I x l l l I l l I IITIIIII H. H. BURTON.

ADDING ATTACHMENT FOR TYPE WRITERS.

APPLICATION FILED JULY 23,1908.

N VE N 70/? He 22 ryHai/ec/r B air/022 B Y MLS A TTOHNE Y3 W/TNESSES H. H. BURTON.

- ADDING ATTACHMENT FOR. TYPE WRITERS.

APPLICATION FILED JULY 23,1908.

921,358. Patented May 11, 1909.

WITNESSES INVENTOI? H. H. BURTON.

ADDING ATTACHMENT FOR TYPE WRITERS.

APPLICATION FILED JULY 23,1908.

921 ,358. Patented May 11, 1909.

4 SHEETS-SHEET 4.

WITNESSES lNVENTOR H622 23 12 512160X B air/072 B) W ATTORNEYS certain UNITED STATES PATENT ornron.

HENRY HALLECK BURTON, O'F LOS ANGELES. CALIFORNIA.

ADDING ATTACHZMEN'T FOR TYPE-WRITERS.

Specificationof Letters iatent.

Patented. May 1 1, 1909.

Application filed July 2a, 1908. Serial No. 444,932.

To all whom it may concern:

Be it knownthat I, HENRY HALLEOK BUR- TON, a citizenof the United States, and a resident of Los- Angeles, in the county of Los Angeles and State of California, have invented a new and Improved Adding Attachment for Type-Writers, 0t which the following is a full, clear, and exact descriptiony This invention relates to certain improve merits i-n-adding attachmentsfor typewriters, and'more particularly to thattype of attachment disc osed in 883,081, grantedMarchM', 1908. I

The obiject of my invention is to improve referred to, whilenraintaining substantially the same general arrangement of parts and .method of operation.

More in detail, the more important objects of my invention are as follows: to facihtate the attachnlent'and detachment of the add-' ing device to and fromthe numeral key-bars of the tfypew'riter; to provide for the adjustment 0 the device in respect to the nwneral key-bars, whereby any numeral wheel may be-rotated .to different extents by theoperation of different key-bars and these amounts accurately determined and controlled;v to improve the numeral wheels, whereby the nu-morals may loo-printed on a larger scale and renderedin oreclearly visible; topro'vide certain. improvements in the carrylng devices, by means'of which one num eralwheel is rotatedone oint upon the rotation of an adjacent whee through ten points, and to improve the numeral wheel-rotating means,

' ence indicate corresponding parts in all the figures, and in which 7 Figure 1 is a vertical section through a portion of a typewriter having my improved adding. attachment secured thereto; Fig. 2

is a front elevationof the parts shown in Fig.

1, the key-bars being shown in section; Fig. 3. is a front elevation showing the parts with being shownin my prior patent Number the details of my previous devicein the'casing of my improved device, the

front of the casing being IGIPOVGCl Fig. 4 is a detail view si rilar to a portion'of Fig. 1', but

on an enlarged scale; Fig. 5 is an invertedplan view of the parts shown in Fig. 4;; Fig.

6 is a top plan view of the outer end of the wheel-rotating arm. shown in Figs. 4 and 5;

- Fig. 7 is a detail showing the mechanism em- .ployed for adjusting the operating arms in respect to the main shaft, a portion thereof section; Fig. '8 is a top plan view of the parts shown in Fig. 7; Fig. 9 is a detail showlng an auxiliary key enployed forreleasing the numeral wheel-carrying casing and Fig.10is a detail showing one of the depending carrying levers.

The typewriter which I have illustrated as being provided with my improved adding attachment, is'substantially the same as that shown in my prior patent above referred to.

This typewriter includes a main frame 1, a

roller 2, a carriage 3, a plurality-of key-bars 4, and keys 5. Within the frame of the typewriter, there is mounted the mainframe 6 of my improved device, and movable within said main frame 6, is a casing 7 carrying the numeral wheels and the operating mechanism therefoiz' The frame 6- constitutes a guide and support for the casing 7, and

mechanism is provided whereby the casing moves longitudinally of the frame simultane: ously with the movement of the carriage.

' Within the frame of the typewriter and beneath the casing of the adding device, (see Figs. 1 and 2) there is mounted a rock shaft 8, substantially thesame as that disclosed in my previous patent. Extending outwardly from this rock shaft, there are rovided a plurality of arins 9, each of which is connected at its front end to one of the key-bars.

in my previous patent, this means includes a band encircling the key-bar and a spring connecting the band with the end of the arm 9, but'in my present and improved construction, the spring is omitted, although a band 10 is employed. The band is clamped to the key-bar in anysuitable manner and tel-mi natcs in an upwardly-extending hook or lug 11.. Depending from the front end of each arm 9 is a bar- 12, the lower end of which comes adjacent the lug or hook 11 when the key-bar-is'in-its highest position. The bar 12, upon its rear S1(l6, carries a lug 13, to which is pivoted a catch or hook 14', adapted to engage with the lug or catch ll'carriedby the key-bar The catch or hook I4 is formed substantially the same as a bell crank lever, and is provided with anoutwardly-extending arm or branch 15, normally pressed" downward by the action of a small lea-t spring Thiss ring tends to keep the hooks or catches 14 an 11 iii engagement-"with each other, so

that a downward movement of the type bar causes a simultaneous movement of the corres ending arm 9/ For'detaching the severa catches 14, so that the typewriter may be operated independentlyof the adding at tachinent, I providea rock shaft 16, having its opposite ends mounted in the typewriter frame. The shaft'is provided with a plural g ity of arms 16, which when the rock shaft is rotated, may be brought beneath the arms 15 s to raise the latter against the action of the springs 15. and'hold the catches 14 out of engagement Withthe catches 11. The shaft maybe rotated by means of a; hand wheel 17 at one end thereof, andis provided with a coil spring "17, whichnormally tends to ro-.

tate it in' one direction. For holding the shaft stationary 'and'against the action of thespring, said shaft is preferably provided with a small ratchet wheel 17, which engages, witha pivoted dog 17 v I g the position indicated in Fig. .1, the adding ith. the parts in attachment is operated by. the operation of the typewriter, but by rotating the shaft 16 countereiockwise-to raise the arms 15, the dog 17 ?-holds-the' shaft'against return rota- ;tion and the typewriter' may be operatedin dependently of theadding device. Instead sponding arm. V I In the construction shown in my previous patent, I provide the hub. of each of the arms 9 with difiler'ent sized slots, therein, for engagenient by corresponding pins in the rock shaft 8, but this necessitates the provision of a plurality of different kinds of arms 9 and renders difficult the ad'ustiuent of the arms should they or their ho ding pins 8 becoiize worn. To avoid this, I, in my present construction, provide the, hubs of all of the arms 9 withelongated slots of thesanie length, as shown particularly in F gs. 7 and 8; and provide the rock shaft with a plurality ofpins 8 extendingv through these slots. Secured to the upper side of each arm 9,.1s an ad ust-ing bar 9", having one end thereof ad acent the 1 hub of the arm and having a slot therein through which the corresponding'pin 8 also extends. Each bar adj 'acent its forward end,

is threaded 'aniilextends through a lug-9 on the sa iic-ai'in, the adjacent bar being nor- :nally held against longitudinal movement by nuts 9 engaging with opposite sides of a plurality of numeral wheels 23.

senses thelugs 9 Byadjusting the nuts 9*, the rod or bar 9 may be moved longitudinally in respect to any 9, and the rock shaft may bemused to rotate when. the arm has been swung through any desired angle. By

soronstructing the parts, all of the aims -0 iii'ay be u; ads alike and interchangeable.

' Extending rearwardly from therock shaft 8, as shown particularly in Fig. 1 there ispi ovidcd a lever ]S"con iected at itsrear end to a vertically-extending linl; 19, which latter at its upper end is connected to a lever 20 intermediate the ends of the latter. This lever 'is pivoted at its rear end'to a rcarwardly-extending bracket 21, and at its forward end is constructed for operating the nuiixeral-wheel The parts 18, 19, 20 and rotating means. 2] are substantially the same as shown in my previous patent, save the forward or opcrating endv oft-he lever 20.

its shown particularly in elusive, the casing 7 serves to so iport ainain shaft 22, upon which; are rotate ly n ounted The casing also serves. to support the wheehrotating 1:;ech anisr, locking niechanis 21, carrying irechanis n and the zero setting. iii'cchanis :2,

Figs. 3 to 6, in

all of which aresi nilar in many particulars to the corresponding mechanism: shown in my previous patent. Each'wheel 23 is free continuous rowof teeth 24, aninterinediatc row of teeth 25,..and a plurality of ratchet 9 5 to rotate on the shaft, and is provided with a teeth 26 in between the two rows of teeth 24 and 25, andene face of eachwheel is provided with a row of laterally-extending teeth 27. The row of teeth .24, previously stated, is continuous, and the nunibeijof teeth is preferably a multiple of ten. ,The

teeth25 are of substantially thesazne size as the teeth 24, but are arranged in series of sevens, each series being spaced from the next one by a gap, the width of three con-.

secutive teeth; Thus, the number of series of sevens in the teeth 25 isequal to one-tenththe nuntber of teeth inthe row 24." The,

ratchet teeth 26 be any desired distance apart, as they do not serve in the counting or in determining theex'tent of rotation; ref erably, they correspond in number andlhcation to the teeth 24. There are one-tenth as many teeth-27 as there are teeth 24, and each tooth 27 crimesoppositeto a gap in the p row 25. v

.Instead of printing the numerals onthe' llll ilel'ill ir l ieels '23 about the" periphery thereof, 1 provide a separate wheel 23?, hav

ing a toothed pension 2 adapted to inter: mesh with the teeth 24 of the eorr esfisnding wheel 23 and having alargr portion 23 rovided with a si no'oth periphery, upon w ich the numerals are printed, only one numeral being visible at a ti ile through a'borrespond ing window in the casing 7,as indicated in Figs. .2 and 4.- Although the -wheels 23,

ing, and I therefore hereinafter refer to' the wheelsi23 as the-numeral wheels, and the Wheels h dicating Wheels For 'causin mterlnittent rotation of each wheelt'hreugf one space upon the rotation of the next ad acent wheel-oflower denomination througl ten s aces, I provide -a car cry ng mechanism di ering 'very materially ufrom that; shown in inpre'vious 'patent.'

In mypresen't',construction I provide a lurality of depending arms '28, correspon mg to the several numeral wheels, and each-suspended from -'a rod 28 above .the' shaft 22.

Each rod is suspended-L directly above the corresponding wheel,- but adjacent the up er edgeof thewheel it is-"oll'set as indicate in i Fig. 10and extends downwardly to adjacent the lower edge of'th'e wheel ,A portion of the rod is curved to partiallyencircle the shaft 22. Each rod at its lower {endcarries an outwardly-extending ru 2'8i tlying in the path of the teeth 27' of th wheel, and each rod is limited against swinging movement in one dircctiontb .a stop 28'.

and is normally held against said stop b la, suitablecoil spring 28" -Adjacent the 0 set portion, each rod is provided Wit'h'a dogo'r ,a corresponding ,wheel. wheel rotatesthrough ten'spaces, a tooth27 of said wheel engages with the lug 28 of the pawl 29, (see'Fig. 10) {having its lower end in engagement with the ratc et'teeth 26-01 As thenumeral rod 28, of the next adjac nt wheelof higher denomination, andswings'sai'd rod toward the front of the casing. At the Instant thata zero on the corres ending indicating wheel comes to view, the ug 28 slips beneath the tooth 27 'and'the sprlng 28 draws the rod back to the position indic ted inYFig; 4.

The return movement of tie rod causes-a rotation of the wheel 23 corres ondingto said rod, through one's'pace. hus; each time anumeral wheel rotates through ten spaces, the adjacent numeral wheelof higher denomination is rotated through vone space. 'For rotating a numeral wheel upon the operation of a numeralkey of the typewriter, there are rovided a plurality of arms 30, corresp'om ing to the arms employed in my previousconstructionr Each of these arms carries a roller 30 at its free end, which is adapted to engage within a yoke 2O ofthe lever 20. Each arm 30 is provided adjacent the. periphery of its corresponding wheel 23.-

with a pawl 31 adapted toengag with the ratchet teeth 26, the pawl being held contimmuslv in engagement withsaid teethhy awsuitahle'sp'ring 31 secured to'thc arm and engaging with the upper, endof the pawl. As the arm is raised, the wheel 23 remains stationary, but upon the descent of the arm,

e next adjacent the wheel is rotated to an extent dependent upon the elevation to which the arm was raised, Each -wheel is normally locked againstrotation, but the upward movement of an arm serves to 'unlockthe wheel and permit ofits being rotated upon the descent 'ofi'thearm. 7 This locking mechanism is also adaptedto be o eratedwhen the adjacent wheel of lower enomination has been rotated-through'ten spaces. Ithus provide a single lockin mechanism in' place of the two separate lociin'g mechanisms illustrated in my previous patent Below the Wheels 23 and in the rear there of, lyinount-a rod 32,- havin a plurality of collars 33 thereon, correspon ing to thermal: ber of-wheels. Each collar is provided with a slot therein, into which extends a pin 34 of therod, so that the collar has a limited rotation in respect to the-rod; Each of these collars is provided with three outwardly-extending arms, one of which, 35, terminates in an upwardly-extending hook end 36.

adapted to engage in the teeth '24 and con stitute a locking member. A second of these arms, 37, extends into the path of the teeth 27 of the next, adjacent wheel of vlower denomination, so that during the rotation of one wheel 23, it will intermittently rotate one collari33 and lower the arm 35 to unlock theadjacent wheel of. higher denomination at the instant that .another one of the teeth 27 releases the rod 28'and 'ermits its returnmovement to rotate said w ieel of higher denomination. The third arm, 38, carried by 100.

the collar 33 extends rearwardly and is in the form of a s ring. This arm extends beneath a stud-30 carried by the arm 30 at the end thereof, so thatwhen the arm 30 is-in itslowermost position, it depresses thespring arm 38 and rotates the sleeve 33 to hold'the arm 35 in looking position. .The instant that thefarfm 30 is'raised, the corresponding collar may rotate-and unlock the wheel to permit its rotation during the return movement of the arm 30. Thus, all of thewheels are normally locked, but the raising of any arm 30 unlocks the corresponding wheel, and therotatioh. of any wheel brings a zero-to View through the window of the casing, un 1 l5 locks the wheel of higher denomination and rotatesfit one space. J For preventing the rotation -of the wheels 23 in the reverse direction during the raising of the arms corresponding thereto,-I provide a plurality of dogs 39, pivoted to a transverse rod 40 mounted in the casing'7. This rod preferably also serves to support one end of each of the springs 28, which hold the rods 28 in one of their limiting positions In connection with the mechanism above described, I employ zero-setting mechanism substantially thesameas that illustrated in my previous patent, save that the shaft 45 in'stead of being mounted above the wheels 1 30 shaft are mounted the pinions46, which upon the longitudinal movement of the shaft, may

be brought into mesh with the intermediate series of teeth 25..- The shaft 46 is provided with a suitable milled head or wheel 48 at its ing a plurality of numeral key-bars, a catch end, and a spring 49 for normally holding'the shaft in such a position that the pinions do not engag with the wheels 23.

The casing 7, as previously stated, is mounted to slide withinthe-frame 6, and for moving itin one direction, I provide a third spring 54 of substantiallythe same character "as that commonly employed in connection with typewriter carriages. I employ substantially'the same escapement for releasing the casing 7" astepat a time upon themovement of the typewriter carriage, and permitting its movement simultaneously with the carriage and in the same direction,,as is disclosed in my previous patent. The detail description of such mechanism is-not thought to be-necessary in this application. For

holding'the pasing' 7 .at-the left-hand end of.

the frame 6 and looking it against return movement, I preferably 'provide a. pivoted catch (see Fig. 2), adapted to engage with a pin or stop-51 on the casing; 7, and'having its opposite end connected to a link 52, (see Fig. 9T, which extendsdownwardly to an auxiliary key-bar 53. This keybar is p'ivot-- ally mounted upon the shaft 8 and is )ro-.

vided at itsforward end with a strikinglp ate '55. The key-bar is normally held in its theretofcmeans connecting said arms to their raised position by the action of a spring 56, similar to the springs 9 of. the arms 9.

Having thus described my invention, I

claim as new and desire to secure by Letters Patent:

1. In combination with a typewriter having a plurality of numeral keys, a shaft, arms mounted .thereonand movable relatively corresponding keys, and independent means arms in respect to said shaft.

for adjusting the relative movement of said 2. Inf-combination, a rock shaft, a plurality of arms mounted thereon, means for moving said arms to rock said. shaft, and an adjusting bar carried by each of said arms and substantially parallel thereto, forcontrolling the movement of said arms in respect to said shalt.

3. In combination, a rock shaft, a pluralityof arms mounted thereon, a plurality of pins carried by said shaft adjacent said.

. arms, and an adj ust'in rod carried by each of said arms and mo'vab e longitudinally thereof, and having a slot therein for receiving corresponding pin of said shaft.

4. In com i rality of pins carried thereby, a arms mounted onsaid shaft .anr each having a slot therein for receiving the'correspending pin. a rod carried by said arm and the nation, a rock shaft, a -plu-'. plurality of I .7.I n combinapion with ing a plurality o numeral key-bars, a hook or catch carried by each of said bars, a memwhich said rod extends, and nuts threaded upon said rod and adapted to engage opposite sides of said lug.

5.- In combination with a typewrit e1;..hav

hooks out of engagement with said first' mentioned hooks. Y

a typewriter havber adjacent'each of said key-bars, a hook pivoted to each of said members and adapted to en age with the hook of the correarms extending outwardly therefronrand adapted uponthe rotation of said shaftto hold said second-mentioned hooks out of engagement with said first-mentioned hooks.

ing a plurality of numeral key-bars, a hook -01' catch carried by each of said bars, a memupon the rotation of said shaft to holdsaid spending ;ey-bar, a shaft, and a plurality of l I 8-. In combinationwith a typewriter havsecond-mentioned hooks out of engagement with said first-mentioned hooks, means normallytending to rotate said shaft in one direction, and means normally preventing said rotation.

9Q Inan adding machine, a shaft, a plurality of wheels loosely mounted thereon, an

' K I arm pivoted to said shaft ad accnt each of said wheels and each adapted to swing in one direction to rotate the corresponding wheel and to swing in the reverse direction indei pendent-1y of said wheel, arock shaft adjacent said wheels, and a plurality of locking arms carried thereby for cngagei'nent with sa1d; wheels, and means whereby anyone of.

said-arms is imoved to. inoperative position upon the movement of the corresponding firs tment1oned arm away from one of lts two limiting positions. I I

10. In an addmg machine, a shaft, a wheel mounted thereon, an arm pivoted to the wheel ad acent the shaft and having a pawl for engagement with said wheel to rotate .cluding a plurality of the latter when said arm is moved in one di rection, a second shaft adjacent the periphcry of said wheel and having a collar there-on, an arm carried, by said collar and adapted to engage with said wheel to lock the latter against rotation, and a second arm carried by said shaft andadapted to engage with said first mentioned pivoted arm, whereby the latter when in one position, holds said locking arm in operative position.

11. An adding machine, comprising a plurahty of wheels, each having a row of later- 4 ally-extending teeth, means for rotating each of said wheels a definite distance upon the movement of an adjacent wheel through a distance ten times as great, said means inpivoted rods having engagementwith said lateralIy-eXtending teeth, means for normally locking said wheels against rotation, and means including an arm extending into the path of said laterally-extending teeth for intermittently unlockin each of said Wheels to permit its rotation y said pivoted rod.

12. An adding machine, including a plurality of wheels, a lever arm adjacent each of said wheels and adapted to'rot-ate the same, a shaft adjacent said plurality of collars thereon, a locking arm carried by-each of said collars for engagement with the corresponding wheel to hold the latter against rotation, an arm carried by each of said collars for engagement with the corresponding lever arm to unlock the wheel upon the movement of said lever arm, and a second lever arm carried by'each of saidoollars and adapted to engage with an adjacent wheel to nnlock -its corresponding wheel intermittently during the rotation of said adjacent Wheel.

13. In an adding machine, a plurality of wheels and having a' j rality of wheels, a lever wheels, each having a row of laterally-extending teeth and a row of radially-extending teeth, means adapted to beintermittently operated by 7 teeth for rotating the next adjacent wheel, and a plurality of oscillatory collars adja cent said wheels and each having an arm for engagement with the radially-extending teeth of its corresponding wheel, to lock said wheel, and having an arm extending into engagement with the laterally-extending teeth of an adjacent wheel to be operated by the latter for intermittently unlocking its corresponding wheel.

14..r .n adding machine, comprising a shaft, a plurality of wheels mounted thereon, a le yer arm adjacent each of said wheels and adapted to,rotate the same, each of said arms terminating in a roller, and a pivoted lever having a yoke adapted to engage with any one of said rollers and serving to operate any one of said levers. a

15. An adding machine, comprising a pluarm adjacent each wheel and adapted to engage with its corresponding wheel for rotating the latter, all of said wheels together with their corresponding arms being movable axially of the wheels, each of said leverarms terminating in a roller, and a lever mounted on a stationary pivot and terminatingin a yoke adapted to engage with said r0 lers in succession when said wheels are moved axially.

In testimony whereof I have signed my name to this specification in the two subscribing witnesses.

HENRY HALLECK BURTON. W Vitnesses:

J. W'. WALTON,

R. A. CRAWFORD.

Said laterally-extending presence of v 

